odhner



Dec, 2 1924. 1,517,858

v. J. ODHNER CALCULATING MACHINE Filed Jan. 22, 1921 5 Sheets-Sheet 1I121; gna

mac. 2, 1924, 1,51?,858

v. J. ODHNER CALCULATING MACHINE Filed Jan. 22, 1921 3 Sheets-Sheet 3Patented 5, 319ml.

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oanoons'rine iii-seams Application filed January 22, 1921. Serial No.339,268.

T all whom it may, concern:

"Be it known that I, Vsnszrrm Janos Onnn'nn, a subject of the King ofSweden, and resident of Rasunda, near Stockholm, in the Kingdom e1Sweden, have invented certain new and useful Improvements in CalculatingMachines, of which the tollowing is a specification, reference being hadtherein to the accompanying drawings.

T he present invention relates to a mechanism for suchcalculatingmachines, which are provided with rotary adjusting discs withmovable teeth, which may be shifted by means of rotary cam-discs or thelike, provided with teeth or the like and which may be brought intoengagement with respective movable racks, provided with teeth or thelike, and the object of said mechanism is to make such machines aseasily managed and. above all as dependable as possible. According to mylnvention the racks may be moved in their longitudinal direction in aguide-way in each arm, which arm, independent of the other arms, ismounted for swinging movement about a suitable pivot, so that each rackmay be separately brought into engagement with the correspondingcam-disc or respectively advanced for shifting the cam-disc and theteeth. The mechanism includes also a mechanism for bringing thecam-disc's, etc., back to their initial position and a mechanism bymeans of which the openingsin the niachinecasing for reading otl thefigures indicating the number of the advanced teeth, may be brought nearto the openings in which the result is read oil, inorder' quickly toattain a dependable survey. All the mechanisms are, according to my invention, so combined with each other that the whole arrangen'ient maywork in an absolutely reliable way.

ln the accompanying drawings is shown a convenient embodiment of myinvention. Univ that much of the calculating machine is shown as isnecessary to explain the invention. Fig. 1 is a side view of one of theadjusting discs with its adjustin i' IllQClltUilSlIl. Fig. 2 is a. frontview of the machine with a portion of the casing broken away. Figs. 3,5, 6 and show certain details and Fig. i is a side view of an adjustingdisc with its adjusting mechanism in active position.

In the drawings 1 indicates the adjusting discs with their teeth 2. Theadjustins discs are fastened to an axle 4c, journalled in the casing 3,said axle being rotated as usually with a crank. 5 indicates thecam-discs for adjusting the teeth, said cam-discsbeing rotatable on theshaft 1 and provided with slots (3. The cam-disc 5 is locked in a knownway by means of a spring operated hook, which engages teeth on thecam-disc. This locking mechanism is however not shown inthe drawing. Thedisc 5 is provided with teeth 7. In front of each adjusting disc isprovided an arm 8, which is turnabie on a pivot 9 in the lower portionof the standard. This arm is made of two parallel pieces of the sameform, which are kept together at some dis tance alongside each other bvmeans of a cross-piece 10 and pins 11. in the opening between the twoside-pieces of the arm the rack 12 is placed, in such a Way, that it maybe moved all along the arm, being; guided by said side pieces and pins13,

which are driven through the arm. and

which slide in slots 14 in the side pieces. In the upper end of the rackis a slot, corresponding to the crosspiece 10, in order that the rackshould be able to occupy its highestv position without being hindered bythe crosspiece. The rack is arranged to be brought into engagement withthe teeth 7 on the cam-disc.

The rack can be shifted by means ot a crosspiece 15, which extends fromthe rack through a slot 16 in the casing and the free end of which. isformed as a handle. The rack 12 is held in its inactive position bymeans of a spring 17, which operates upon the arm 8, and that edge ofthe rack, which is turned towards the casing is provided with a numberoi? equally sp acet notches 18, which are adapted to cooperate with astop in the form of a pin 19 which is provided in the casing in order tolock the rack after each adjustment, determined by the number of theadvanced teeth.

The figures for reading ed the number the advanced teeth are provided ona bio band. of steel which is attached the upper end oithe rack andwhich runs hetween .two guiding rollers 21 in the arm 3 and through a.slot 23 prouided in a. fixed round or nearly round member 22, the fig;ares 01" the band being visible through an opening in the casing. Theband is sufficiently ilexihle to permit it to slide through the slot' 23at the upward and downward .nient oi the rack, but at the same time :osuliiciently rigid to prevent itfrom {ling or folding between therollers 21 the point where it enters the said slot, id for this reasonthe band will uniformfollow the movement of the rack in its itircty.Consequently, just the figure 'l ich (.OIlGSPOlMlS in eacii separatecase to g osition oi. the rack ill be visible in ooening Q l. The memberwhich is nari supported in. the upper portion 1. case 3 near tofigure-discs (not shown in the drawing) is provided with as many slotsas there are set-discs in the machine. Each slot is provided withlateral guide flanges 25 and the portion of the slot lying behind andbelow the opening 24: is covered by a. cover plate 26. By means oi theabove descriltied arrangement for rnoviug the figures the advantageisgained that. the openings in the casing for these figures may beprovided near to the openings where result of the calculating operationis d oil, whereby a survey oil all openings r the figures is quickly androliablyl obtained.

Fi 5 and l show a nioditied arrangetal-cinr up the figure-blunts. According to this arrangement the one end of the hand is fastened to adisc :37. which is ably placed. on an axle 28. which is it'oi'iarilysupported in the casing 33. disc is keptin its given position on in bymeans of discs 2f) attached to 4 said axle. The hand is rolled the discagainst the actioi'i oping 29*, connected with the Jasi-ened to the disc29. v described adjusting mechanism as .tollows. l i hcn adjusting the iof the disc 1, a. linger is pressed down- .n'ds against the handle 15.Because the .ortic-n 30 which at the. top bounds the lowest notch 18 inthe rack 12 is bevelled 0a upwards a wedge, the arm. is swung inwaiagainst the action ol the spring l7, so that the rack will engage theteeth 7 of the canrdisi: and. at the same time the reel:

moved downwards. llvidently the mechanism must he so adjusted that thelate a IWVQllQQl'lti oi the rack in the beginning er than its verticalmovement. that cajl'enient may not be rendered im- Alter th s is done isonly arc to move tb' ,i-a-clt downwards while pressing ightly inwards inorder to get the desired number of teeth of the setdisc 1 advanced,which number at the same time is read oil in the opening 2%. To eachposition of the cam-disc 5 relative to the teeth 2 corresponds a. notch18 in the rack and a figure on the hand 20. The movement of the rackinwards is limited by a projection 31 on the handle 15 which projectionwhen the rack is shifted slides along the casing at the side of the slot16. The movement of the rack-up and down is limited by the slots .4 andthe pins 123. Evidently the rack cannot be moved unless it is swungforward, so that the pin. 18) is disengaged from the slot which catchesthe pin and the rack is engaged with the teeth 7. Any movement of therack when it is disengaged from the teeth, well as its disenghgmnent ina position, which corresponds to a tooth not fully advanced. can nottake place. As soon as the desired number of teeth are advanced thehandle 15 is disengaged and the 210k is automatically swung; back actedupon by the slums 17 in order not to prevent the successive rotation ofthe adjusting discs.

In order to prevent any wrong adjustment it is convenient to retract allthe adjusting disys l, and the racks 12 to the initial positionin'nnediately after each calculating operation. For this purpose arotatable roll 32 is journallcd under and alongside the adjusting discsand said roll is opposite each cam-disc. 5 provided with a toothedsegment around the greatest portion of its periphery. When the roll isrotated these toothed segments will engage the teeth of thecorresprmding cam-discs 5 as soon as they do not hold their initialposition. The roll is rotated "for example with a winged nut 3%. Thenumber of the teeth of the segments 33 is so chosen, that the engagementbetween the teeth of the segments and the cam-discs will cease. at thesame in stunt the canrdiscs occupy their initial position. Thus thesegments will not pre ent the rotation of the adjusting discs. In orderthat the cam-discs 5 should take along with them respective racks whenthey return to the initial position the machine is provided with amember, formed as a movable bar 35, which is located alongside the arms,and by automatically operating the latter, when the roll is rotated eachrack 12 will be brought into engagement with the corresponding cam-disc5 before being retracted. Said bar 35 is movable arouid two pivots inthe machine 00 standard which are provided in arms 37 19;. 3) pro ecting"from the bar. The bar 1; fi'irthermore provided with another arm "5 tld f Q on iie opposite side, one lite on 0 which isprovlded with afriction-roller 39. This roller is pressed against the roll 32 by meansaspring 40, which is fastened to the bar and to a pin 41 located abovethe disc 1.

' camdiscs c bar. A smaller arm 42 extends from the arm 8 and the arm 42is located under the bar and maybe brought to engage a projection 43located at the underside of the bar. That portion of the roll 32 overwhich the roller 39 slides when the roll is rotated, is provided with adepression or recess at to partially receive the roller 39 and in whichthe roller is held by means of the spring when the roll is not operated.This mechanism is so arranged that when the arm 4,-2- rests against theprojection 43, the-rack is in inactive position, locked by "the pin 19.As soon as the roll 32 is rotated, which is done by means of the wingednot in the direction of the arrow, in order to bring the cam-discs etc.back. to them initial position, the roller 39 is brought out of therecess 44, the bar is swung down, depressing the arm 42 and bringing therack 12 into engagement with the teeth 7. The roll 32 constitutes a camwhich, during r0 'tation operates against the roller 39. Instead of theabove mentioned portion of the roll a special cam-disc of the same formand attached to the shaft of the roll-may be used. All the toothedsegments 83 occupy such a position relative to'the recess .4 that thebar is completely depressed, and the rack 12 engages the teeth 7 beforethe toothed segments engage the same. Fig. 4 shows the operation of theadjusting mechanism. The rack is in that position, which corresponds tothree advanced teeth.

In order to prevent the shifting or move ment of the racks 12 into, meshwith the gear teeth 7 unless the set-discs l with the are in thezero-position, the machine is provided with. another bar 46, which isjonrnalled between the arms 37 of the bar 35. Said bar 4% is providedwith a number of arms at corresponding to the number of adjusting discs,which arms extend for some distance below the bar 35 and end aboutopposite the respective projections 43, so that the end of each arm 42will be located between the projection 43 and the arm 47. By means of aspring 48 all the arms 47 are pressed against respective arms 42 Anotherarm 48 extends from the opposite side of the bar and the end of this armis bentto form a hook' 49, whichin a certain position is adapted toenter a notch in a round disc 51, 1'0- tatably supported at the side ofthe one extreme adjusting disc 1. This disc is by means of two'gears 52,53, which engage each other, connected with the shaft 4, so that thismovement is transferred to the the same number of teeth." If the hook 49is brought into enga 'ement with the cess50 of disc 51, which can bedoneonly Both the gears 52 and 53 have' dentiy locked and also theadjusting discs.

This is done either when the rack 12 is brought into engagement with theteeth 7 or when the roll 32 is rotated, because in both cases the arm 42engages and depresses the bar 16 and swings up the hook 49. discs arenot in the zero-position, the circular portion of the disc-51 ispresented to the hook 4-9 and the bar d5 locks both the rack 12 and theroll 32 in the inactive position by pressing the arm 42 up and theroller 39 into the recess at.

Thus by the above described adjusting mechanism the accurate operationof the machine is insured. v

Having now described my invention, what I claim as new and, desire tosecure by Letters Patent is:

If on the other hand the adjusting 1. In a. computing machine, rotatableadjusting disks, movable teeth carried by said disks, toothed cam disksarranged to shift said teeth, independently movable pivoted arms havinggnideways means tending to maintain the pivoted arms in normal position,and rocks movable longitudinally in said guideways and engageabie withthe teeth of the cam disks, said racks being separately movable intoengagement with the cam disk associated therewith and resdnectivelymovable for shifting said cam isk.

2 A computing machine as claimed in claim 1 in which the rack isprovided with a plurality of notches corresponding tothe respectivepositions of the can; disk, and a stop member adapted to, enter thenotches to lock the rack in inoperative position, the lowermost notchhaving a beveled. wall adapted to co-act with the stop member to eileotmovement of the rack, into operative relation with the cam disccoincident with initial movement of the rack.

3. A computing machine as claimed in na claim 1, characterized by theprovision off meansfor returning the rachm'cam discs? and ad ustingdiscs to initial. position, said mechanism comprising a plurality ofgear segments arranged adjacent the cam discs,

and means co-acting with said segments to move the racks into engagementwith the;

respective cam discs prior to the return of the latter to nitialposition.

/ 4. A computing machine-as claimed claim '1, characterized by theprovision of";

means actuated by the rack sup orting arms to lock the several adjustingiscs in zero sition.

5. r computing machine as disclosed inclaim 1 characterized by theprovision of a flexible indicating element attached to each rack andactuated thereby to indicate the relntirel; stationary roller receivingthe indicating elenicnt when the rack is retracted;

and niennt to guide the indicating clement whereby the latter is causedto coil upon the rewiring menus:

In witness whereof I signed my name.

"ALENTIX JAKOB ODHNER.

have hereunto

